Miss Longhurst, a special needs teacher and talented musician who went to Maiden Erlegh School and played in Reading Youth Orchestra, was last seen in Brighton on Friday, March 14.

Sussex Police are working with other forces who have investigated similar disappearances and a geographical profiler has been brought in to identify search areas.

More detectives have been drafted in to help the 45-strong team trying to trace the 31-year-old, who lived in a Brighton flat with her boyfriend Malcolm Sentance.

Detective Chief Inspector Steve Dennis, who is heading the inquiry, said: "We continue to speak with other forces who have experienced cases like this in the hope that it may lead us to what may have happened to Jane.

"It's just one of a number of things that we are doing to try to solve this mystery.

"It's now been 11 days since anyone last saw or heard from Jane. While her family and the police are still keeping an open mind as to what has happened, it is looking increasingly like she has been abducted."

He added that many of Jane's friends had been traced but appealed for others to come forward to help them build a picture of her life.

Hundreds of posters showing Miss Longhurst have been plastered across Brighton.

An appeal made by Miss Longhurst's boyfriend, mother Liz Longhurst, of Stanhope Road in Whitley, and sister Sue Barnett last week failed to find her.